I have seen a few nurses at the hospital that I worked at with small tattoos on the hand. It was not made to be a big deal, they were not bold or eye-catching and we had so much work to do that it was not thought about much. One nurse did say that she wore scar make-up to her interview to hide her tat. DON'T LET A TATTOO STOP YOU IF YOU FEEL NURSING IS YOUR CALLING.